What PRIMARY LATERAL SCLEROSIS means: Primary Lateral Sclerosis - (PLS) is a rare neuromuscular disease characterized by progressive muscle weakness in the voluntary muscles. PLS belongs to a group of disorders known as motor neuron diseases. Motor neuron diseases develop when the nerve cells that control voluntary muscle movement degenerate and die, causing weakness in the muscles they control. Onset of PLS usually occurs after age 50. Symptoms may include difficulty with balance, weakness and stiffness in the legs, and clumsiness. Other symptoms may include spasticity (sudden, involuntary muscle spasms) in the hands, feet, or legs; foot dragging, and speech problems due to involvement of the facial muscles. The disorder usually begins in the legs, but it may also start in the tongue or the hands.
- Definition Postural Orthostatic Tachyardia Syndrome (POTS):
- Dictionary Orthostatic Tachyardia Syndrome (POTS) - A disorder characterized by a pulse rate that is too fast when the patient stands. Symptoms include rapid heartbeat, lightheadedness with prolonged standing primary lateral sclerosis.
- Definition Postural Hypotension:
- Dictionary Hypotension - Orthostatic hypotension is a sudden fall in blood pressure that occurs when a person assumes a standing position. It may be caused by hypovolemia (a decreased amount of blood in the primary lateral sclerosis.
- Definition Postherpetic Neuralgia:
- Dictionary Neuralgia - (PHN) is a painful condition caused by the varicella zoster virus in a dermatomal distribution (the area governed by a particular sensory nerve) after an attack of herpes zoster (HZ primary lateral sclerosis.
- Definition Parkinson'S Disease:
- Dictionary Disease - (PD) belongs to a group of conditions called motor system disorders, which are the result of the loss of dopamine-producing brain cells. The four primary symptoms of PD are tremor, or primary lateral sclerosis.